The 40/50 Black Key & Thumb Turn Cylinder is a developer-grade door security solution designed for modern residential and commercial interiors across the UAE. Featuring a key operation on one side and a thumb turn on the other, this cylinder provides convenient internal locking while maintaining secure external access—ideal for apartments, hotel rooms, offices, and flush door systems.

Finished in matte black, the cylinder integrates seamlessly with contemporary interiors, concealed frames, and invisible doors. Manufactured for durability and smooth operation, it supports consistent performance in high-traffic environments. Supplied in bulk with reliable UAE-wide availability, DoorHub’s thumb turn cylinder is optimized for large-scale developer projects requiring dependable security hardware, aesthetic consistency, and fast project execution in Dubai and Abu Dhabi.